Dear Animal Collective,

Dear Animal Collective,
What kinds of animals are you?
You can’t be a herd of cows, a murder
of crows, or a crash of rhinos. Not an
army of ants, nor a troop of baboons.
Not a shiver of sharks, nor a mustering
of storks. What kind of animal gathers
together into “collectives”?
—Katherine Muller, assistant professor
of biology, Yale College